【摘要】 研究以花生秆为原料,用超声波法提取花生秆水溶性膳食纤维(SDF),并对SDF的抗氧化活性进行了研究。单因素和正交试验结果显示超声波提取SDF的最佳工艺条件为:超声波频率28kHz、反应温度80℃、反应时间120min、超声波功率240W。在此条件下,SDF的得率为5.35%,SDF中非淀粉多糖(NSP)含量为65.49%,SDF的综合评分为45.44%。抗氧化活性试验结果表明SDF有较好的清除羟自由基、超氧阴离子自由基、DPPH自由基和铁还原力、钼还原力的抗氧化活性。超声波在提取花生秆SDF中的应用是扩大花生秆的应用范围以及高附加值利用花生秆的一种可行的方法。更多还原

【Abstract】 The preparation technology of water soluble dietary fiber(SDF) from peanut stem by ultrasonic wave and the antioxidant activity of SDF were investigated.By single factor and orthogonal experiments,the results showed that the optimal conditions for ultrasonic wave extraction of SDF were the ultrasonic wave frequency of 28kHz,the reaction temperature of 80℃,the reaction time of 120min and the ultrasonic power of 240W.Under the optimum technological conditions,the yield of SDF was 5.35%,the percentage content of the non-starch polysaccharides(NSP) in SDF was 65.49% and the average comprehensive score of SDF was 45.44%,respectively.In the end,the experiments of SDF antioxidant activity were carried out.The results indicated that SDF have remarkable antioxidant activity for scavenging the hydroxyl radicals,super oxide anion radicals and DPPH radicals,iron reducing activity and molybdenum reducing activity.Application of ultrasonic wave extraction SDF is a feasible and novel route for broadening of the application fields of peanut stem and high-value utilizing peanut stem.更多还原